<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Globe Layers - ECHARTS-GL</title>
        <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
        <meta name="apple-mobile-web-app-capable" content="yes"> <!-- Fullscreen Landscape on iOS -->
        <link rel="stylesheet" href="./common.css">
    </head>
    <body>
        <div id="main"></div>
        <div id="toolbar">
            <button id="add-cloud">Add Cloud</button>
            <button id="add-echarts-map">Add ECharts Map</button>
            <button id="switch-shading">Switch Shading</button>
        </div>
        <script src="../node_modules/echarts/dist/echarts.js"></script>
        <script src="../dist/echarts-gl.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="js/commonUI.js"></script>
        <script>
            var chart = echarts.init(document.getElementById('main'));

            // http://visibleearth.nasa.gov/view_cat.php?categoryID=1484
            chart.setOption({
                globe: {
                    baseTexture: 'asset/world.topo.bathy.200401.jpg',
                    heightTexture: 'asset/elev_bump_4k.jpg',

                    displacementScale: 0.1,

                    shading: 'lambert',

                    light: {
                        ambient: {
                            intensity: 0.1
                        },
                        main: {
                            intensity: 2
                        }
                    },
                    viewControl: {
                        autoRotate: false
                    },

                    layers: []
                },
                series: []
            });

            var shading = 'lambert';
            var cloudAdded = false;
            $('#add-cloud').click(function () {
                cloudAdded = true;
                chart.setOption({
                    globe: {
                        layers: [{
                            name: 'cloud',
                            texture: 'asset/clouds.png',
                            shading: shading,
                            distance: 10
                        }]
                    }
                });
            });
            $('#switch-shading').click(function () {
                if (!cloudAdded) {
                    return;
                }
                shading = shading === 'lambert' ? 'color' : 'lambert';
                chart.setOption({
                    globe: {
                        layers: [{
                            name: 'cloud',
                            shading: shading
                        }]
                    }
                });
            });

            window.addEventListener('resize', function () {
                chart.resize();
            });

        </script>
    </body>
</html>